Portion of an appliance



FIG. 1 is a front perspective view of a portion of an appliance showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken line showing of various regions, including the unshaded areas therein, is for illustrative purposes and forms no part of the claimed design. 

The ornamental design for a portion of an appliance, as shown and described. 